From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C93F6C54EBD for ; Tue, 3 Jan 2023 09:51:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237310AbjACJvI (ORCPT ); Tue, 3 Jan 2023 04:51:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237280AbjACJup (ORCPT ); Tue, 3 Jan 2023 04:50:45 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 047D4E0EE for ; Tue, 3 Jan 2023 01:50:44 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id AD95FB80E73 for ; Tue, 3 Jan 2023 09:50:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B188C433F0; Tue, 3 Jan 2023 09:50:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672739441; bh=ksABWOILjZpEH8g2g2MW4ZIXOmX06sjGYHgn9lXfTFo=; h=From:To:Cc:Subject:Date:From; b=g5Jw+NnWDK6lM4inBLft9cmxDjeWejVbQgxI9tg+L9zjH/A2ju3GT3zmewDQMwA5C 2OHIMEGvSdwMUDNI2gC+CY5H/AzwwgysbSbDOA/WCj7qlomkDH/xEwztbYMWf4qZB4 +5chikFtIqXyNNgv8fHVb6t+iNdY6ufSM6sT7XB019cZjKFJvn3AhLZxLrQOFqC3fh AFnHFoUsQz+8Af5JhNts8kcktDUBEiC7tb/O1YKEWD0JHWk9bb1oJb7ry5iQzNo2Yp 6aRt8kRsrVlcGrnnHG2o7Uba3VyafAHdM2u+KdtC6qXC8vhxIc+uaEv3Ji/TOyoxIg H62E2CzfWVPHg== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pCdwN-00GTcP-3O; Tue, 03 Jan 2023 09:50:39 +0000 From: Marc Zyngier To: , Cc: Hector Martin , Sven Peter , Alyssa Rosenzweig , Thomas Gleixner , Will Deacon , Catalin Marinas , James Morse , Suzuki K Poulose , Alexandru Elisei , Oliver Upton , asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/3] KVM: arm64: M2 vgic maintenance interrupt rework pre-NV Date: Tue, 3 Jan 2023 09:50:19 +0000 Message-Id: <20230103095022.3230946-1-maz@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.cs.columbia.edu, kvmarm@lists.linux.dev, marcan@marcan.st, sven@svenpeter.dev, alyssa@rosenzweig.io, tglx@linutronix.de, will@kernel.org, catalin.marinas@arm.com, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, oliver.upton@linux.dev, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, I've spent the holiday break reviving the Nested Virt KVM/arm64 implementation[1] and allowing it to work on the Apple M2 SoC. The amusing part is that it actually works! However, the way the vgic is implemented on this HW is still at odds with the rest of the architecture, and requires some hacks, some of which are independent of the actual NV code. This is what this series is about. The first patch places M2 on the naughty list of broken SEIS implementations, just like the M1 before it. The second patch allows a vgic MI to be registered, even if this MI cannot be masked (we disable it at the source anyway). The last patch hacks the AIC driver to actually register the vgic MI with KVM. I plan to take the first patch as a fix for 6.2, while the rest can be deferred to 6.3. [1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-6.2-WIP Marc Zyngier (3): KVM: arm64: vgic: Add Apple M2 cpus to the list of broken SEIS implementations KVM: arm64: vgic: Allow registration of a non-maskable maintenance interrupt irqchip/apple-aic: Register vgic maintenance interrupt with KVM arch/arm64/include/asm/cputype.h | 4 +++ arch/arm64/kvm/vgic/vgic-init.c | 2 +- arch/arm64/kvm/vgic/vgic-v3.c | 3 +- drivers/irqchip/irq-apple-aic.c | 55 ++++++++++++++++++++++++-------- 4 files changed, 49 insertions(+), 15 deletions(-) -- 2.34.1